* First cut commit *unfinished
* Replace SNI handler with TlsHandler with certificate selected based on host name found in clientHello
* first cut tests for SniHandler
* test update
* Test update
* Supress further read when handler is replaced
* made the snitest more effective and IDN in hostname lower case as per netty impl
* More asserts to check whether snihandler gets replaces with tlshaldler in the pipeline
* assert server name is always found in clienthello as per the test setup
* Provided option to select default host name in case of error or client hello does not contail SNI extension, otherwise handshake fails in those cases
* More elaborate tests
* verbosity in test
* Fixed Read continues to get called after handler removed and removed the workaround in SniHandler
* relaced goto statement with flag for breaking outer for loop from within switch
* Update SniHandler.cs
* trigger CI build
* addressed review comments
* Fixed task continuation option
* addresses further review comments
* triggere build again with some more assert in test #221
* suppress read logic is still needed due to async "void"
* changing the map to (string -> Task<ServerTlsSettings)
* one more constructor overload
* extensive tls read/write test is not needed since that's already done in tlshandler test
* more readable target host validation in test to force retrigger confusing CI build
* retrigger
* addressed review comment "this generates 30 random data frames. pls replace with new [] { 1 }"
Krishnendu Ghosh